Problem transferring version 4 profile to version 5

I have a WAPT profile created using WAPT version 4. Each page has been amended to set the values of the __VIEWSTATE and __EVENTVALIDATION parameters to be 'hidden' values to avoid errors on playback. This script runs as expected on Version 4.I have copied this scenario and profile to another PC on which WAPT 5 is installed. Running this consistently gives a viewstate error on page 3 of the profile:

Validation of viewstate MAC failed. If this application is hosted by a Web Farm.....

Is it not possible to run version 4 profiles on version 5, or do I have a different problem ?

I have a WAPT profile created using WAPT version 4. Each page has been amended to set the values of the __VIEWSTATE and __EVENTVALIDATION parameters to be 'hidden' values to avoid errors on playback. This script runs as expected on Version 4.I have copied this scenario and profile to another PC on which WAPT 5 is installed. Running this consistently gives a viewstate error on page 3 of the profile:

Validation of viewstate MAC failed. If this application is hosted by a Web Farm.....

Is it not possible to run version 4 profiles on version 5, or do I have a different problem ?

Hello Robert,

Now we are trying to find the reason of this. I will let you know as soon as possible.

Now we are trying to find the reason of this. I will let you know as soon as possible.

It seems that the problem was due to the bug with __Viewstate which was fixed in our latest build. So please download it from our site www.loadtestingtool.com. If the problem remains, please let me know.